JP5613038B2 - Method for forming water-stop part of wire harness, water-stop material used for water-stop part forming method, and wire harness - Google Patents

Description

  The present invention relates to, for example, a method for forming a water-stop part of a wire harness routed between electronic and electric devices mounted on an automobile, a water-stop material used in the water-stop part forming method, and a wire harness.

  Conventionally, grommets have been used to route a wire harness from the engine room of an automobile to the vehicle interior. This grommet allows a wire harness to pass through a panel that partitions the engine room and the vehicle interior, and the wire harness penetration part of this grommet is usually subjected to a water stop treatment.

  As a method for forming a water stop portion of this type of wire harness, there is one disclosed in Japanese Patent Application Laid-Open No. 2005-71790 shown in FIG. 11 (see Patent Document 1).

  In this wire harness water stop portion forming method, as shown in FIG. 11, first, U-shaped portions of the water stop portion forming jig 7 are disposed on both sides of a predetermined position of the wire bundle 2 in which a plurality of electric wires 1 are bundled. It is supported by a pair of large support tools 8 and 8, and the inner wire bundle 2 is held by a pair of support tools 9 and 9 having a smaller U-shaped portion, thereby loosening and expanding in the vertical direction.

  Next, after applying liquid silicon 3 as a water-stopping material between the unwound and widened electric wires 1, the electric wires 1 are converged as shown in FIG. After the portion to which 3 is applied is dried, the water-stop sheet 4 is wrapped around the portion and covered. Next, the water stop part 6 is formed in the predetermined position of the wire harness W / H by winding the tape 5 around the both ends of the water stop sheet 4. By fitting the water stop portion 6 to the wire harness penetration portion of the grommet, the wire harness penetration portion is subjected to a water stop treatment.

  In Patent Document 2 (Japanese Patent Laid-Open No. 2003-59359), the electric wire is vibrated from the sheet member of the bonded water-stopping agent application sheet, or the water-stopping agent application sheet is slid against the electric wire. A waterproofing method for a wire harness is disclosed in which a water-stopping agent applied to a water-stopping agent-applied sheet is transferred to and penetrates an electric wire.

  Further, in Patent Document 3 (Japanese Patent Laid-Open No. 11-7842), a plurality of electric wires are embedded in a butyl rubber sheet, and then the butyl rubber sheet is rolled into a substantially cylindrical shape to stop the electric wires between the electric wires constituting the water stop portion. A water method is disclosed.

JP 2005-71790 A JP 2003-59359 A Japanese Patent Laid-Open No. 11-7842

  However, in the conventional method for forming a waterstop portion of a wire harness described in Patent Document 1, since liquid silicon 3 having viscosity is used as a waterstop material, silicon 3 is applied during the operation of applying silicon 3. However, it was difficult to handle the water-stopping material. In order to cope with this, in the water stopping method between electric wires described in the above-mentioned conventional Patent Document 3, it is difficult to adhere to an operator's hand using a solid water stopping material. Water-stopping material became indispensable, and the cost was increased accordingly.

  Furthermore, in the conventional wire harness waterproofing method described in Patent Document 2, since the electric wire is moved by applying vibration or sliding to the electric wire, the electric wire may be bent or the electric wire may be damaged.

  Therefore, the present invention has been made to solve the above-described problems, can improve the handleability of the water-stopping material, and reliably and efficiently impregnate the water-stopping material between a plurality of electric wires. An object of the present invention is to provide a waterproofing part forming method for a wire harness, a waterproofing material used for the waterproofing part forming method, and a wire harness.

According to the first aspect of the present invention, each electric wire at a predetermined position of the electric wire bundle in which a plurality of electric wires are bundled is spread and developed, and after filling the water stop material between the separated electric wires, the electric wires are converged. with the water stopper forming method of a wire harness forming the waterproof part by winding a waterproofing sheet, and arranging a plurality of wires situated in the waterproof part elongated give away in the vertical direction, then the vertical direction Each of the elongated wires is covered with a solid water-stopping material formed into a sheet, and then this sheet-like solid water-stopping material is pressurized while being heated from outside with a heating and pressurizing means. The water stop material is impregnated between the wires elongated in the vertical direction , and then the wires impregnated with the water stop material are converged and the water stop sheet is wound around the water stop portion. It is characterized by forming.

According to the invention of claim 2, each electric wire at a predetermined position of the electric wire bundle in which a plurality of electric wires are bundled is spread and developed, and after filling the water stop material between the separated electric wires, the electric wires are converged. In the method for forming a water stop part of a wire harness that winds a water stop sheet and forms a water stop part, a plurality of electric wires located in the water stop part are respectively divided into a plurality of rows, and the plurality of electric wires distributed in each row the vertically elongated give away and wired, then coated with a respective electric wire Barasa elongated in the vertical direction are distributed to the respective columns in solid waterproof material which is formed into a sheet, then, The sheet-like solid water-stopping material is pressurized while being heated from the outside by a heating and pressurizing means and is impregnated with the water-stopping material between the electric wires that are distributed in the rows and elongated in the vertical direction , respectively. Next, each row impregnated with this water-stopping material By winding the waterproofing sheet with converging the respective wires and forming the waterproof part.

Invention of Claim 3 is the water-stop part formation method of the wire harness of Claim 1 or 2, Comprising: Using what covered one surface of the said sheet-like solid water stop material with the release paper, After the other surface of the sheet-like solid water-stopping material is bonded to each electric wire elongated in the vertical direction of each row, the heating and pressurization is performed with the release paper still attached. The solid waterstop material is melted and impregnated between the electric wires in each row by applying pressure while heating from the outside by means.

According to the invention of claim 4, each electric wire at a predetermined position of the electric wire bundle in which a plurality of electric wires are bundled is spread and developed, and after filling the water stop material between the separated electric wires, the electric wires are converged. In the water-stopping material used in the water-stop forming method of the wire harness that winds the water-stop sheet and forms the water-stop part, the sheet is formed into a sheet and is solid at a normal temperature but does not flow and droop Molded and coated with release paper on one side of the solid sheet without sticking but flowing at room temperature, but the sheet is viscous at room temperature but flows and droops After the other solid surface is bonded to each separated electric wire, it is heated and heated by the heating and pressurizing means through the release paper to change from a solid state to a liquid state. So that each wire is impregnated Characterized in that was.

  Invention of Claim 5 is a wire harness, Comprising: The water stop part formed with the water stop part formation method of the wire harness as described in any one of the said Claim 1 thru | or 3 is provided in the predetermined position of an electric wire bundle. It is characterized by that.

As described above, according to the invention of claim 1, and arranging a plurality of wires situated in the water-stop portion of the wire harness elongated give away in the vertical direction, then each was Barasa elongated in the vertical direction The electric wire is covered with a solid water-stopping material formed into a sheet, and then the sheet-like solid water-stopping material is pressurized while being heated from the outside by a heating and pressurizing means, and is elongated in the vertical direction. A water-stopping material is impregnated between each of the electric wires, and then each electric wire impregnated with the water-stopping material is converged and a water-stop sheet is wound around to form a water-stop portion. Handling property can be improved, and a water stop material can be impregnated reliably and efficiently between a plurality of electric wires.

According to the invention of claim 2, a plurality of electric wires located in the water stop portion of the wire harness are respectively distributed into a plurality of rows, and the plurality of electric wires distributed in each row are elongated in the vertical direction and routed. to the respective electric wire Barasa elongated in the vertical direction are distributed to the respective column coated with solid waterproof material which is formed into a sheet, then heating the solid water stopping material in the sheet form Each of the water-impregnated materials is impregnated between the electric wires which are pressurized while being heated from the outside by a pressurizing means and distributed to each row and elongated in the vertical direction. By converging each electric wire in the row and wrapping a water-stop sheet to form a water-stop part, the handleability of the water-stop material can be improved, and the water-stop material can be reliably and efficiently placed between multiple wires. Can be impregnated. In addition, a water stop portion can be easily and reliably formed even in a large-diameter wire bundle having a large number of wires by performing water stop treatment by distributing a plurality of electric wires into a plurality of rows.

According to the invention of claim 3, a sheet-like solid water-stopping material having one surface covered with release paper is used, and the other surface of the sheet-like solid water-stopping material is arranged in each row. After bonding to the wires that are elongated in the vertical direction , press and apply heat while applying heat from the outside with a heating and pressurizing means with the release paper still attached, By melting and impregnating the water material, the melted water stop material does not adhere to the heating and pressurizing means, and workability can be improved.

According to the invention of claim 4, it water stopping material is drip and viscosity are but flows even at room temperature while being formed into a sheet is formed into not a solid and some viscous even at room temperature in sheet form but flow One side of the solid state that does not hang down is covered with release paper, and this sheet is sticky to each electric wire that separates the other side of the solid state that is viscous at room temperature but does not flow and hang down After that, by applying pressure while heating with a heating and pressurizing means through a release paper so as to be impregnated between each separated electric wire by changing from a solid state to a liquid state, Further, it is difficult to attach a water-stopping material to other parts, and workability can be further improved.

  According to the invention of claim 5, since the water stop material is stably infiltrated between the plurality of wires of the wire bundle, it is possible to reliably prevent water from entering the vehicle interior from the through hole of the panel on which the grommet is mounted. A highly reliable wire harness that can be obtained can be obtained.

It is a perspective view which shows the state which distribute | divided the some electric wire which comprises an electric wire bundle into two right and left rows, and was spread | divided up and down, when forming the water stop part of the wire harness of one Embodiment of this invention. It is a perspective view which shows the state which bonded the water stop material with a release paper to each electric wire distributed to the said right-and-left 2 rows and separated up and down. It is sectional drawing which shows the state which bonded together the water stop material with a release paper to each said electric wire distributed up and down. It is a perspective view which shows the state which heats and pressurizes the water stop material bonded to each electric wire distributed to the left-right 2 rows and sticking up and down with a heating paper through the release paper. It is a top view which shows the state which each electric wire of each row | line was converged, after impregnating a water stop material between each electric wire divided into the said right-and-left 2 rows and distributed up and down. It is a top view which shows the part which converged each electric wire of the said 2 right-and-left 2 rows further to one, and was impregnated with the water stop material. It is a top view which shows the state which wound the water stop sheet | seat around the part impregnated with the said water stop material. It is a top view which shows the state which wound the tape around the both ends of the said water stop sheet | seat, and formed the water stop part. It is a front view of the heating-pressing means used when heating and pressurizing the water stop material. It is sectional drawing which shows the state which fitted the water stop part of the said wire harness to the wire harness penetration part of a grommet. When forming the water stop part of the conventional wire harness, it is a perspective view which shows the state which spread | deployed the several electric wire which comprises an electric wire bundle up and down. (A) is a perspective view which shows the state which winds a water stop sheet to the part which made the water stop material impregnate each electric wire of the said conventional wire bundle, (b) shows the state which winds a tape around the both ends of the water stop sheet. A perspective view and (c) are perspective views showing a water stop part of the wire harness.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a state where a plurality of electric wires forming an electric wire bundle are divided into two left and right rows and spread up and down when forming a water stop portion of a wire harness according to an embodiment of the present invention. FIG. 3 is a perspective view showing a state in which a water-stopping material with release paper is attached to each electric wire distributed in two rows on the left and right, and FIG. 3 is a water-stopping material with release paper on each electric wire that has been distributed up and down. FIG. 4 is a cross-sectional view showing the state of bonding, and FIG. 4 shows that the water-stopping material bonded to each of the electric wires distributed up and down in the left and right rows is heated and pressurized by a heating and pressurizing means through release paper. FIG. 5 is a plan view showing a state in which the electric wires in each row are converged after impregnating a water stop material between the electric wires divided up and down in the left and right rows, and FIG. 6 is a part in which the two wires on the left and right sides are further converged into one and impregnated with a water stop material. FIG. 7 is a plan view showing a state in which a water-stop sheet is wound around a portion impregnated with the water-stop material, and FIG. 8 is a tape that is wound around both ends of the water-stop sheet to form a water-stop portion. FIG. 9 is a front view of the heating and pressurizing means used when heating and pressurizing the water-stopping material, and FIG. 10 is a fitting of the water-stop portion of the wire harness to the wire harness penetration portion of the grommet. It is sectional drawing which shows the state which carried out.

  As shown in FIG. 10, the wire harness penetration part 51 of the grommet 50 that penetrates the wire harness W / H through a panel (both not shown) that partitions the engine room and the passenger compartment of the automobile has a predetermined wire harness W / H. The water stop part 14 formed in the position is fitted and water stop processing is performed. When forming the water stop part 14 in this wire harness W / H, the water stop material 20 shown in FIG. 2 and FIG. 3, the water stop part forming jig 30 shown in FIG. 1, FIG. 2 and FIG. The heating and pressing means 40 shown in FIGS. 4 and 9 are used.

  As shown in FIG. 2 and FIG. 3, the water blocking material 20 is formed into a rectangular thin plate-like sheet shape using hot melt having heat melting property, and is viscous even at room temperature, but does not flow and droop. It is molded into a solid state. One surface 20 a of the sheet-like solid waterproof material 20 is covered with a release paper 21. Then, the sheet-like solid water-stopping material 20 is bonded to each of the vertically separated electric wires 11, which will be described later due to its viscosity, and then pressurized while being heated by the heating and pressing means 40 via the release paper 21. Thus, the wires 11 are impregnated between the wires 11 which are changed from solid to liquid and vertically separated.

As shown in FIGS. 1, 2, and 4, the water stop portion forming jig 30 has a U-shaped holding portion 31 a having a large interval for holding both sides of the wire bundle 10 constituting the wire harness W / H. The pair of holders 31 and 31 and the plurality of wires 11 of the wire bundle 10 between the pair of holders 31 and 31 are divided into two rows on the left and right sides, and are elongated while being elongated in the vertical (vertical) direction. A pair of front and rear holders 32, 32 are provided in two sets on the left and right with a U-shaped holding portion 32a. These holders 31 and 32 can be adjusted in position in the height direction.

  As shown in FIGS. 4 and 9, the heating and pressing means 40 includes a pair of holders 41 and 42, and a heating and pressing plate 43 attached to the opposing surfaces of the holders 41 and 42. . Each of the heating and pressing plates 43 is heated to, for example, 90 ° C. and can melt the water blocking material 20.

  Next, the process of forming the water stop part 14 in the predetermined position of the wire harness W / H is demonstrated in order along FIGS.

  First, as shown in FIG. 1, while holding both sides of the wire bundle 10 located in the vicinity of the position of the water stop part 14 to be formed by a pair of holders 31 and 31, a plurality of wires of the wire bundle 10 11 is divided equally into two left and right rows, and a plurality of wires 11 of each of the small bundles 10L and 10R equally distributed in the two left and right rows are vertically separated by a pair of front and rear holders 32 and 32, respectively. Arrange one line at a time.

  Next, as shown in FIG. 2 and FIG. 3, a sheet is placed on both the left and right sides of each of the electric wires 11 of each of the electric wire small bundles 10 </ b> R and 10 </ b> L that are equally distributed in two left and right rows and arranged one by one vertically. Each of the surfaces 20a of the pair of solid water blocking materials 20, 20 formed into a shape is bonded to the electric wires 11 from the left and right with the viscosity. At this time, the release paper 21 is not peeled off from the other surface 20b of each water blocking material 20 and is left attached.

  Next, as shown in FIG. 4, a pair of sheet-like solid waterproofing materials 20 attached to both surfaces of each of the electric wires 11 that are separated one by one in the right row (10R), 20 is pressed while being heated from above the release paper 21 affixed to the other surface 20b of each water blocking material 20 by each heating and pressing plate 43 of the pair of holders 41 and 42 of the heating and pressing means 40, The water-stopping material 20 melted between the electric wires 11 separated so as to be arranged one by one vertically in the right row (10R) is impregnated. After impregnating the water-stopping material 20 melted between the electric wires 11 separated so as to be arranged one by one in the right row (10R), one piece is arranged in the left row (10L) one by one. Similarly, the water stop material 20 melted by the heating and pressurizing means 40 is impregnated between the separated electric wires 11.

  Next, as shown in FIG. 5, after peeling the release paper 21 from the water blocking material 20, the left and right electric wires 11 impregnated with the water blocking material 20 are folded and laminated to laminate the left and right electric wire bundles 10 </ b> L. , 10R is converged. Next, as shown in FIG. 6, the left and right electric wire bundles 10 </ b> L and 10 </ b> R are further converged to form one electric wire bundle 10. Since the water blocking material 20 is viscous even at room temperature, there is no gap between the water blocking materials 20 even when the left and right electric wire bundles 10L, 10R are converged after heating. From this state, as shown in FIG. 7, a water-stop sheet 12 made of ethylene / propylene rubber is wound around the portion of the wire bundle 10 impregnated with the water-stop material 20, and thereafter, as shown in FIG. The water stop portion 14 is formed at a predetermined position of the wire harness W / H by winding the tape 13 around both ends of the water stop sheet 12. As shown in FIG. 10, the water harness through portion 51 of the wire harness W / H is fitted in close contact with the wire harness through portion 51 of the rubber grommet 50, so that the wire harness through portion 51 is subjected to a water stop treatment. Is done.

  In this way, after the other surface 20b of the sheet-like solid water-stopping material 20 is bonded to the respective electric wires 11 separated vertically in two rows on the left and right sides, the release paper 21 is stuck. In this state, the heating and pressurizing means 40 applies pressure while heating from the outside to melt and impregnate the solid water-stopping material 20 between the two left and right electric wires 11, so that the water-stopping material is interposed between the electric wires 11. 20 can be impregnated reliably and efficiently. Further, since the pressure is applied while being heated from the outside by the heating and pressurizing means 40 with the release paper 21 being stuck, the water-stopping material 20 melted on the heating and pressurizing plate 43 of the heating and pressing means 40 adheres. No, workability can be improved. Furthermore, the water stop portion 14 can be easily and reliably formed even in a large-diameter wire bundle in which the number of the wires 11 is larger than the conventional one by distributing the plurality of wires 11 in two rows on the left and right sides and applying the water stop treatment. Can do.

  Furthermore, since the electric wire 11 is not moved as in the prior art, the electric wire 11 is not damaged. In addition, since a sheet-like solid water-stopping material 20 is used and one having a release paper 21 attached to one surface 20a of the water-stopping material 20 is used, as compared with a conventional liquid-like one. In addition, it is difficult for the water-stopping material 20 melted in the operator's hand during the work to be attached, and the handleability of the water-stopping material 20 can be improved.

  Further, since the heating is performed in addition to the pressurization of the heating and pressurizing means 40 as compared with the conventional one (for example, Japanese Patent Laid-Open No. 11-7842), the amount of the water blocking material 20 can be reduced. That is, even if the material of the water blocking material 20 is small, the fluidity is improved by heating, and the water blocking material 20 can be reliably impregnated between the electric wires 11. Furthermore, even if the electric wires 11 are not neatly aligned (even if the electric wires are close to each other or slightly cross each other), the water stop material 20 can be impregnated reliably and efficiently between the electric wires 11. Furthermore, since the water-stopping material 20 is formed into a sheet shape and is formed into a solid state that is viscous even at room temperature but does not flow and sag, it is somewhat hard at room temperature (viscosity but low fluidity). Therefore, it is difficult to attach the water-stopping material 20 to other parts such as the operator's hand and work clothes at the time of work, and the work is very good.

  Further, according to the wire harness W / H provided with the water stop portion 14 at a predetermined position of the wire bundle 10, the water stop material 20 is stably permeated between the plurality of wires 11 of the wire bundle 10. Thus, it is possible to obtain a highly reliable wire harness W / H that can reliably prevent water from entering through the through-hole of the panel on which 50 is mounted.

  In addition, according to the above embodiment, two solid water-stopping materials formed into a sheet shape are bonded to both sides of each vertically separated electric wire so that each electric wire is sandwiched by its viscosity. A single water-stop material is attached so as to make a round around each of the separated electric wires, or the upper and lower portions of each of the electric wires that are separated vertically are inverted U-shaped. And may be folded in a U shape and pasted together. Further, when the plurality of electric wires of the electric wire bundle are vertically distributed, the left and right two rows are equally distributed. However, they may not be evenly distributed, and may be distributed to one row or three or more rows.

DESCRIPTION OF SYMBOLS 10 Electric wire bundle 11 Electric wire 11R, 11L Small electric wire bundle of each row 12 Water stop sheet 14 Water stop part 20 Sheet-like solid water stop material 20a One side 20b The other side 40 Heating and pressurizing means W / H wire harness

Claims (5)

After spreading each wire at a predetermined position of a bundle of wires in which a plurality of wires are bundled and filling a water stop material between each separated wire, the wires are converged and a water stop sheet is wound around In the method for forming the water stop portion of the wire harness that forms the water stop portion,
A plurality of electric wires positioned in the water stop portion are elongated in the vertical direction, and then the electric wires elongated in the vertical direction are covered with a solid water stop material formed in a sheet shape. Next, the sheet-like solid water-stopping material is pressurized while being heated from outside by a heating and pressurizing means, and the water-stopping material is impregnated between the wires elongated in the vertical direction , respectively, The method for forming a water stop portion of a wire harness is characterized by converging the electric wires impregnated with the water stop material and winding the water stop sheet to form the water stop portion. After spreading each wire at a predetermined position of a bundle of wires in which a plurality of wires are bundled and filling a water stop material between each separated wire, the wires are converged and a water stop sheet is wound around In the method for forming the water stop portion of the wire harness that forms the water stop portion,
Distributing each a plurality of wires situated in the water stop portion in a plurality of rows, and arranging a plurality of electric wires distributed to the respective columns elongated give away in the vertical direction, then vertical direction allocated to the respective columns Each of the elongated wires is covered with a solid water-stopping material formed into a sheet, and then this sheet-like solid water-stopping material is pressurized while being heated from outside with a heating and pressurizing means. Then, a water-stopping material is impregnated between the wires distributed in the rows and elongated in the vertical direction , and then the wires in the rows impregnated with the water-stopping material are converged and the stoppage is made. A method for forming a water stop portion of a wire harness, wherein the water stop portion is formed by winding a water sheet. A method for forming a waterstop part of a wire harness according to claim 1 or 2,
The sheet-like solid water-stopping material was covered with release paper and the other surface of the sheet-like solid water-stopping material was elongated in the vertical direction of each row. After being bonded to each electric wire, the solid waterproof material is applied between the electric wires in each row by applying pressure while heating from the outside with the heating and pressurizing means with the release paper being stuck. A method for forming a water stop portion of a wire harness, characterized by melting and impregnating. After spreading each wire at a predetermined position of a bundle of wires in which a plurality of wires are bundled and filling a water stop material between each separated wire, the wires are converged and a water stop sheet is wound around In the water stop material used in the water stop forming method of the wire harness that forms the water stop,
Molded into a sheet and molded into a solid that is viscous even at room temperature but does not flow and sag , and one surface of the sheet that is viscous at room temperature but does not flow and sag The sheet is covered with release paper, and this sheet is viscous even at room temperature, but the other solid surface that does not flow and sag is bonded to each of the separated wires, and then heated via the release paper. A water-stopping material characterized in that it is changed from a solid state to a liquid state by being heated while being heated by a pressurizing means and impregnated between the separated electric wires.   The wire harness provided with the water stop part formed with the water stop part formation method of the wire harness as described in any one of the said Claims 1 thru | or 3 in the predetermined position of the wire bundle.

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